/*
 * Created on 18-Sep-2004
 * Created by Paul Gardner
 * Copyright (C) Azureus Software, Inc, All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

package org.gudy.azureus2.core3.util;

/**
 * @author parg
 *
 */

import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.ReentrantLock;

public class AEMonitor2 {
    ReentrantLock lock = new ReentrantLock();

    public AEMonitor2(String _name) {
    }

    public void enter() {
        lock.lock();
    }

    /*
     * Try and obtain it
     * @return true if got monitor, false otherwise
     */

    public boolean enter(int max_millis) {
        try {
            if (lock.tryLock(max_millis, TimeUnit.MILLISECONDS)) {

                return (true);

            } else {

                return (false);
            }
        } catch (Throwable e) {

            Debug.out(e);

            return (false);
        }
    }

    public void exit() {
        try {
            lock.unlock();

        } finally {

        }
    }

    public boolean isHeld() {
        return (lock.isHeldByCurrentThread());
    }

    public boolean hasWaiters() {
        return (lock.getQueueLength() > 0);
    }
}